Remediation of As/Cr co-contaminated soil by electrokinetic coupled with permeable reactive barrier

Xu, Yunfeng; Fang, Yangfan; Wang, Kaili; Xia, Wei; Qian, Guangren

doi:10.4491/eer.2021.017

Cited by 7 publications

(3 citation statements)

References 41 publications

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“…Enhancing the uptake of CrO 4 2− and SbO 6 H 6 − plasma-ionized metals by utilizing the interlayer ion exchange characteristics of LDHs. For instance, Xin [32], Xu [52], and others introduce iron components into the LDH layer plate. Subsequently, the LDH adsorption triggers an oxidation restoration process, resulting in an ideal adsorptive action.…”

Section: Application Of Ldhs To Metal(loid) Remediationmentioning

confidence: 99%

Soil Remediation from Metal(Loid) Pollution: Advances in Hydrotalcite-Based Intercalation Materials Research

Li,

Zhang,

et al. 2023

Sustainability

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Addressing soil pollution by metals and metalloids necessitates innovative and efficient adsorbent materials. This study scrutinizes layered double hydroxides (LDHs) for their structural versatility and enhanced adsorption capabilities, pivotal in soil remediation. The paper systematically explores the structural characteristics, synthesis methods, and modification techniques of LDHs, as well as their interaction mechanisms with diverse metal(loid) species, such as anionic forms (e.g., AsO43−) and oxygenated ions (e.g., CrO42−, MnO4−). It presents a methodical review of the current understanding and progress in soil treatment strategies, emphasizing the application potential of LDHs. This comprehensive analysis not only underscores the efficacy of LDHs in decontaminating soils but also lays the groundwork for future research trajectories in environmental remediation technologies.

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Section: Application Of Ldhs To Metal(loid) Remediationmentioning

confidence: 99%

Soil Remediation from Metal(Loid) Pollution: Advances in Hydrotalcite-Based Intercalation Materials Research

Li,

Zhang,

et al. 2023

Sustainability

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“…There has been need for combining EKR with other technologies to achieve the effect of contaminant migration and removal [37] since EKR can only make the pollutants in the soil move to the designated region, but cannot easily eliminate the pollutants. This is necessary as the mobilized contaminants, when not removed after their transport, can lead to reversal of electroosmotic (EO) flow, thereby prolonging the duration of the remediation [38].…”

Section: Introductionmentioning

confidence: 99%

Filter media enhanced electrokinetic remediated crude oil contaminated soil: investigation of its engineering properties and its suitability for road construction

Adebayo,

Moses,

Engbonye

et al. 2023

Nig. J. Tech.

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Research have shown how electrokinetic remediation (EKR) technology attempts to tackle the challenge of soil contamination by crude oil. However, the suitability of the resulting remediated soils for use in road construction have not been well reported. This work investigates the engineering properties of filter media enhanced electrokinetic remediated crude oil contaminated soil (COCS) with a view to ascertain its suitability for use in road construction by comparing the performance of charcoal and active carbon as filter materials. COCS collected at a depth of 1m from the Nigerian Pipeline and Storage Company, Kaduna was remediated by using graphite electrodes to pass 1V DC/cm across EKR setups enhanced by incorporating a 1cm thick charcoal and active carbon separately as filter materials across the setups. Average removal efficiencies of 81.4% and 84.6% were obtained against the 78,600 mg/kg oil content of the COCS from charcoal and active carbon filter media enhancements respectively. This showed that active carbon, with higher removal efficiency, is a better filter medium for COCS than charcoal. The compaction and California bearing ratio (CBR) properties of the COCS also improved with the filter media enhanced EKR. However, the CBR values for the filter media enhanced EKR soils only meet the 20% minimum requirements for Type 2 sub-base course materials specified for light trafficked Nigeria roads. As such, charcoal or active carbon filter media enhanced EKR technology can be adopted for remediating COCS for light trafficked Nigeria road construction in areas not subjected to flooding.

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“…However, research has established that EK can only make the pollutants in the soil move to the designated region, but cannot easily eliminate the pollutants. As such, there is a need to combined EKR with other technologies to achieve the effect of removing the moving pollutant in the soil (Yunfeng et al, 2022). Otherwise, Electro osmotic (EO) flow would reverse, which may prolong the entire remediation process (Haruna et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Effect of Charcoal and Active Carbon as Filter Media on Electrokinetic Remediated Crude Oil-Contaminated Soil

Adebayo,

Sani Engbonye,

Musa

et al. 2023

AAES

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Research has shown that traditional electrokinetic remediation (EKR) technology has limited efficiency against different contaminants and soils. This has led to the use of several strategies to enhance the traditional EKR for higher contaminants removal efficiency. This paper separately uses charcoal and active carbon each 1 cm thick as filter media in EKR to enhance the removal of crude oil from crude oil contaminated soil (COCS) containing 78,600 mg/kg of crude oil. The filters are placed very close to the anode compartment containing 0.01 M NaOH electrolytes. Graphite electrodes are used in a face to face configuration to pass 1 V DC/cm through the COCS. Crude oil removal efficiencies of 81.4% and 84.6% respectively are obtained from the EKR setups containing charcoal and active carbon filters after 18 days and 14 days of remediation respectively. This makes active carbon a better filter medium than charcoal for COCS. The results of the chemical oxides compositions show improvement from non-lateritic COCS to lateritic for the filter media enhanced EKR soil. Although active carbon has proven to be a better filter medium compared to charcoal for use in enhancing EKR technology for COCS. Nonetheless, with over 80% removal efficiency, charcoal or active carbon filters be used to enhance EKR remediation of COCS.

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Remediation of As/Cr co-contaminated soil by electrokinetic coupled with permeable reactive barrier

Cited by 7 publications

References 41 publications

Soil Remediation from Metal(Loid) Pollution: Advances in Hydrotalcite-Based Intercalation Materials Research

Soil Remediation from Metal(Loid) Pollution: Advances in Hydrotalcite-Based Intercalation Materials Research

Filter media enhanced electrokinetic remediated crude oil contaminated soil: investigation of its engineering properties and its suitability for road construction

Effect of Charcoal and Active Carbon as Filter Media on Electrokinetic Remediated Crude Oil-Contaminated Soil

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